Question

at the top of the trajectory the direction of acceleration and velocity will be parallel or perpendicular​

Answer 1

Answer:

Explanation:

When a projectile is at its maximum height, the vertical component of the velocity = 0. Thus the velocity of the projectile is in the horizontal direction.

The projectile is acted upon by only one force, i.e. the force of gravity acting in the downwards direction, giving it a downward acceleration.

Thus the direction of its velocity and acceleration are perpendicular to each other.